MUMBAI TATTOO SUPPLY,Liner machines are fitted with 8-10 RAP copper threaded coils for fast running machines, where as shaders come with 10-12 RAP copper threaded coils, Fitting in the machines like top screw are silver coated for best conductivity, are of top quality. The best yet reasonably low prices an artist can ask for. Each machine is individually numbered & comes with a certificate of authenticity & 2 years of warranty on coils.